1. Harold Abelson. 1982. Apple Logo. BYTE/McGraw-Hill. Harold Abelson. 1982. Apple Logo. BYTE/McGraw-Hill.
2. Harold Abelson and Andrea A diSessa. 1980. Turtle geometry: The computer as a medium for exploring mathematics. MIT press Cambridge MA. Harold Abelson and Andrea A diSessa. 1980. Turtle geometry: The computer as a medium for exploring mathematics. MIT press Cambridge MA.
3. Harold Abelson Gerald Jay Sussman and Julie Sussman. 1984. Structure and Interpretation of Computer Programs. The MIT Press Cambridge MA. https://web.archive.org/web/20200129045953/https://mitpress.mit.edu/sites/default/files/sicp/fulltext/book/book.html Also at (non-archival) https://mitpress.mit.edu/sites/default/files/sicp/full-text/book/book.html . Harold Abelson Gerald Jay Sussman and Julie Sussman. 1984. Structure and Interpretation of Computer Programs. The MIT Press Cambridge MA. https://web.archive.org/web/20200129045953/https://mitpress.mit.edu/sites/default/files/sicp/fulltext/book/book.html Also at (non-archival) https://mitpress.mit.edu/sites/default/files/sicp/full-text/book/book.html .
4. Angelos S Agalianos. 1997. A cultural studies analysis of logo in education. Ph.D. Dissertation. Institute of Education University of London. https://web.archive.org/web/20200301032707//id/eprint/10018887/7/Agalianos %20Angelos%20S.pdf Angelos S Agalianos. 1997. A cultural studies analysis of logo in education. Ph.D. Dissertation. Institute of Education University of London. https://web.archive.org/web/20200301032707//id/eprint/10018887/7/Agalianos %20Angelos%20S.pdf
5. John R Allen Ruth E Davis and John F Johnson. 1984. Thinking about TLCLogo: a graphic look at computing with ideas. Henry Holt & Co. John R Allen Ruth E Davis and John F Johnson. 1984. Thinking about TLCLogo: a graphic look at computing with ideas. Henry Holt & Co.